Perhaps the most successful way we've been able to use light to transfer information is fiber optics. ... Through rapid changes in the light, you can send highly complex signals down the cable. These are most often used either for high speed internet connections, or for sending sound signals to home theater systems.
The answer is; gender bias
Discrimination of women of women in society may be conscious or unconscious, subtle or obvious. This is attributed to inculcated cultural tendencies, over history, that tend to treat the female gender as inferior to the male gender.
